Smithery - MCP Registry

Smithery is an MCP (Model Context Protocol) servers registry, listing more than 2,000 MCP servers across multiple use cases:

• Code related tasks (ex: GitHub, E2B)
• Web Search Integration (ex: Brave, Browserbase)
• Database Integration (ex: Neon, Supabase)
• Financial Market Data
• Data & App Analysis
• And more…

Adding a Smithery MCP Server to your Agent

1. Install AgentKit

   Within an existing project, install AgentKit along with the Smithery SDK:

   npm

   npm install @inngest/agent-kit inngest @smithery/sdk

   pnpm

   pnpm install @inngest/agent-kit inngest @smithery/sdk

   yarn

   yarn add @inngest/agent-kit inngest @smithery/sdk

   Don’t have an existing project?

   To create a new project, create a new directory then initialize using your package manager:

   npm

   mkdir my-agent-kit-project && npm init

   pnpm

   mkdir my-agent-kit-project && pnpm init

   yarn

   mkdir my-agent-kit-project && yarn init

2. Setup an AgentKit Network with an Agent

   Create an Agent and its associated Network, for example a Neon Assistant Agent:

   import { z } from "zod";
   import {
     anthropic,
     createAgent,
     createNetwork,
     createTool,
   } from "@inngest/agent-kit";
   
   const neonAgent = createAgent({
     name: "neon-agent",
     system: `You are a helpful assistant that help manage a Neon account.
     IMPORTANT: Call the 'done' tool when the question is answered.
     `,
     tools: [
       createTool({
         name: "done",
         description: "Call this tool when you are finished with the task.",
         parameters: z.object({
           answer: z.string().describe("Answer to the user's question."),
         }),
         handler: async ({ answer }, { network }) => {
           network?.state.kv.set("answer", answer);
         },
       }),
     ],
   });
   
   const neonAgentNetwork = createNetwork({
     name: "neon-agent",
     agents: [neonAgent],
     defaultModel: anthropic({
       model: "claude-3-5-sonnet-20240620",
       defaultParameters: {
         max_tokens: 1000,
       },
     }),
     router: ({ network }) => {
       if (!network?.state.kv.get("answer")) {
         return neonAgent;
       }
       return;
     },
   });

3. Add the Neon MCP Smithery Server to your Agent

   Add the Neon MCP Smithery Server to your Agent by using createSmitheryUrl() from the @smithery/sdk/config.js module and providing it to the Agent via the mcpServers option:

   import {
     anthropic,
     createAgent,
     createNetwork,
     createTool,
   } from "@inngest/agent-kit";
   import { createSmitheryUrl } from "@smithery/sdk/config.js";
   import { z } from "zod";
   
   const smitheryUrl = createSmitheryUrl("https://server.smithery.ai/neon/ws", {
     neonApiKey: process.env.NEON_API_KEY,
   });
   
   const neonAgent = createAgent({
     name: "neon-agent",
     system: `You are a helpful assistant that help manage a Neon account.
     IMPORTANT: Call the 'done' tool when the question is answered.
     `,
     tools: [
       createTool({
         name: "done",
         description: "Call this tool when you are finished with the task.",
         parameters: z.object({
           answer: z.string().describe("Answer to the user's question."),
         }),
         handler: async ({ answer }, { network }) => {
           network?.state.kv.set("answer", answer);
         },
       }),
     ],
     mcpServers: [
       {
         name: "neon",
         transport: {
           type: "ws",
           url: smitheryUrl.toString(),
         },
       },
     ],
   });
   
   const neonAgentNetwork = createNetwork({
     name: "neon-agent",
     agents: [neonAgent],
     defaultModel: anthropic({
       model: "claude-3-5-sonnet-20240620",
       defaultParameters: {
         max_tokens: 1000,
       },
     }),
     router: ({ network }) => {
       if (!network?.state.kv.get("answer")) {
         return neonAgent;
       }
       return;
     },
   });

   Caution

   Integrating Smithery with AgentKit requires using the createSmitheryUrl() function to create a valid URL for the MCP server.

   Most Smithery servers instruct to use the createTransport() function which is not supported by AgentKit. To use the createSmitheryUrl() function, simply append /ws to the end of the Smithery server URL provided by Smithery.

You will find the complete example on GitHub:

Neon Assistant Agent (using MCP) This examples shows how to use the Neon MCP Smithery Server to build a Neon Assistant Agent that can help you manage your Neon databases.